Patents Examined by R. Rabago
  • Patent number: 6528596
    Abstract: A modified particles obtained by contacting particles(a) with a metal compound(b) selected from the group consisting of compounds of the Group VI, VII, XIV metal elements and compounds of the lanthanide series, and contacting the particles with a compound(c) having a functional group containing active hydrogen or a non-proton donative Lewis basic functional group and an electron-withdrawing group; a carrier composed of the modified particles; a catalyst component for olefin polymerization composed of said modified particles; a catalyst for olefin polymerization obtained by contacting the modified particles(A) and a transition metal compound(B), or further an organometallic compound(C); and a process for producing an olefin polymer with the catalyst.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: March 4, 2003
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kazuo Takaoki, Tatsuya Miyatake
  • Patent number: 6528597
    Abstract: The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself and to the catalyst compound in combination with an activator. The invention is also directed to an ethylene copolymer composition produced by using the bulky ligand hafnium metallocene-type catalysts of the invention, in particular a single reactor polymerization process.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: March 4, 2003
    Assignee: Univation Technologies, LLC
    Inventors: Donald R. Loveday, Moses Olukayode Jejelowo, Sun-Chueh Kao
  • Patent number: 6524986
    Abstract: Catalyst support containing an &agr;-olefin polymer which is in the form of particles of mean size from 5 to 350 &mgr;m in which the pore volume generated by the pores of radius from 1,000 to 75,000 Å is at least 0.2 cm3/g. Catalyst usable for the polymerization of &agr;-olefins, including a compound containing at least one transition metal belonging to groups IIIb, IVb, IVb and VIb of the Periodic Table, bound in or on this support.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: February 25, 2003
    Assignee: Solvay Polyolefins Europe-Belgium
    Inventors: Jean-Louis Costa, Vincent Laurent, Philippe Francois, Dirk Vercammen
  • Patent number: 6521727
    Abstract: Novel catalyst systems which comprise diimine nickel complexes comprising additional ligands selected from the group consisting of acetylacetonate, hexaflourylacetylacetonate, halogens and mixtures thereof can be used with methylaluminoxane in slurry polymerization processes to polymerize mono-1-olefins and, optionally one or more higher mono-1-olefin comonomer(s), to produce high molecular weight polymers.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: February 18, 2003
    Assignee: Phillips Petroleum Company
    Inventors: Nancy W. Eilerts, Gil R. Hawley
  • Patent number: 6518377
    Abstract: A polyolefin metallocene catalyst which includes two metallocene components, a stereorigid isospecific metallocene catalyst component and a stereorigid syndiospecific metallocene catalyst component, both of which are supported upon the same support. A method of forming a catalyst system includes contacting the above catalyst with a cocatalyst or Lewis acid. A method of polymerization includes contacting an olefin with the catalyst system.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: February 11, 2003
    Assignee: Fina Technology, Inc.
    Inventors: Edwar S. Shamshoum, Margarito Lopez, Ted G. Harris, III, Sehyun Kim
  • Patent number: 6518376
    Abstract: Disclosed herein are ethylene polymers having a density of 0.95 to 0.955, a melt index from 0.2 to 0.6 g/10 min., a high load melt index from 20 to 70 g/10 min., and a heterogeneity index from 10 to 16, and methods of preparing the same. In certain embodiments the polymers can have a shear ratio from 65 to 100.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: February 11, 2003
    Assignee: Phillips Petroleum Company
    Inventors: Elizabeth A. Benham, Max P. McDaniel
  • Patent number: 6518215
    Abstract: The invention generally relates to a catalyst, particularly a metallocene catalyst and catalyst system useful in the polymerization of olefins into a polymer product. The polymer product has a broad molecular weight distribution, a high molecular weight and a narrow composition distribution and is easily processable.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: February 11, 2003
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Robert Lee Bamberger, Moses Olukayode Jejelowo
  • Patent number: 6515086
    Abstract: A process for preparing polyolefins having a monomer length of up to C10, which comprises first contacting: (1) a metallocene catalyst component for the preparation of a polyolefin which comprises an isotactic polyolefin or syndiotactic/isotactic block polyolefin having a monomer length of up to C10, the component having the general formula: R″(CpR1R2R3)(Cp′R1′R2′)MQ2 wherein Cp is a cyclopentadienyl ring substituted with at least one substituent of R1R2 and/or R3; Cp′ is a substituted fluorenyl ring with substituents R1′ and R2′; R″ is a structural bridge imparting stereorigidity to the component; R1 is a substituent on the cyclopentadienyl ring which is distal to the bridge; R2 is a substituent on the cyclopentadienyl ring which is proximal to the bridge and positioned either non-vicinal or vicinal to the distal substituent; R3 is a substituent on the cyclopentadienyl ring which is proximal to the bridge; R1′ and R2′ are each independently substi
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: February 4, 2003
    Assignee: Fina Research, S.A.
    Inventor: Abbas Razavi
  • Patent number: 6511934
    Abstract: A catalyst composition for the polymerization of olefins is provided, comprising a transition metal precursor containing sulfur ligands and an activating co-catalyst.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: January 28, 2003
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Jessica Ann Cook, John Joseph Bielak
  • Patent number: 6506866
    Abstract: Disclosed is a novel ethylene copolymer by copolymerizing an ethylene and at least one comonomer selected from a compound represented by the formula H2C═CHR wherein R is an alkyl group or an aryl group, and a diene, by slurry polymerization process in the presence of a solid catalyst system comprising a support, a transition metal compound and an activator capable of converting the transition metal compound into a catalytically active transition metal complex. The produced copolymer has a density of from 0.870 to 0.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: January 14, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Grant B. Jacobsen, Fumio Matsushita, Lee Spencer, Peter L. Wauteraerts
  • Patent number: 6506865
    Abstract: The invention is related to a novel compound represented by NdHA4 wherein A is a carboxylate, and to a diene polymerization catalyst using the novel compound. NdHA4 has monomeric structure and does not contain water, bases and salts. NdHA4 is mixed with a halogen compound and an organic metal compound to prepare a catalyst system. The catalyst system in the polymerization of 1,3-butadiene (BD) or isoprene produces high cis polydiene with a high activity (100 g BD/4.0×10−5 mole Nd) and without gel formation. The polydiene thus obtained is useful for tires and golf balls and as a polystyrene modifier.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: January 14, 2003
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Gwang Hoon Kwag, Seung Hwon Lee, Young Chan Jang, A Ju Kim
  • Patent number: 6500907
    Abstract: Catalyst system suitable for polymerizing unsaturated monomers and comprising active constituents obtainable by reacting A) a transition metal compound with B) aluminum trifluoride, C) a cation-forming compound and, if desired, D) further components.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: December 31, 2002
    Assignee: Basell Polyolefine GmbH
    Inventors: Carsten Süling, Marc Oliver Kristen, Günther Schweier, Andrei Gonioukh, Gerhard Hauck
  • Patent number: 6492475
    Abstract: The present invention relates to an ethylene-&agr;-olefin copolymer; a composition thereof; a film thereof; a polar group-containing resin material; and productions and use of the ethylene-&agr;-olefin copolymer. The ethylene-&agr;-olefin copolymer of the present invention is characterized in satisfying the following conditions (A) to (E): (A) a density in the range of 0.92 to 0.96 g/cm3; (B) a melt flow rate (MFR) in the range of 0.01 to 200 g/10 min; (C) a molecular weight distribution (Mw/Mn) in the range of 1.5 to 5.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: December 10, 2002
    Assignee: Japan Polyolefins Co., Ltd.
    Inventors: Toshiaki Egashira, Reiji Higuchi, Kazuyuki Sakamoto, Kimiya Miyoshi, Masahiro Wakayama, Tatsuo Yamaguchi, Fumio Asada, Sinji Miwa, Kenichi Hiraki, Masaaki Ikeda, Yoshimi Shimizu
  • Patent number: 6489416
    Abstract: Ethylene and/or propylene are polymerized to form high molecular weight, linear polymers by contacting ethylene and/or propylene monomer, in the presence of an inert reaction medium, with a catalyst system which consists essentially of (1) an aluminum alkyl component, such as trimethylaluminum, triethylaluminum, triisobutylaluminum, tri-n-octylaluminum and diethylaluminum hydride and (2) a Lewis acid or Lewis acid derivative component, such as _B(C6F5)3, {(CH3)2N(H)(C6H5)}+{B(C6F5)4}−, {(C2H5) 3NH}+{B(C6F5)4}−, {(C6F5)3C}+{B(C6F5)4}−, {(C6F5)3C}+{B(C6F5)3(Cl)−}, (C2H5) 2Al(OCH3), (C2H5)2Al(2,6-di-t-butyl-4-methylphenoxide), (C2H5)Al(2,6-di-t-butylphenoxide)2, (C2H5)2Al(2,6-di-t-butylphenoxide), 2,6-di-t butylphenol.methyl-aluminoxane or an alkylaluminoxane, and which may be completely free any transition metal component(s).
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: December 3, 2002
    Assignee: The Penn State Research Foundation
    Inventors: Ayusman Sen, Louis M. Wojcinski, II, Shengsheng Liu
  • Patent number: 6489033
    Abstract: Electrets can be produced from cycloolefin copolymers (COCs), and charges applied thereto are stable for long periods, even at high temperatures and high relative humidities. The reduction here in a positive charge applied to the COCs is smaller than that of negative charges applied to the COCs. The stability over time of the charges applied is impaired by adding polar additives, such as inorganic silicon compounds. Films, fibers or nonwovens produced from electrets can be processed to give filters.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: December 3, 2002
    Assignee: Ticona GmbH
    Inventors: Wilfried Hatke, Gerhard Sessler, Guo-Mao Yang
  • Patent number: 6486270
    Abstract: A high molecular weight, medium density polyethylene (HMW, MDPE) is disclosed. The polyethylene comprises from about 85 to about 98 wt % of recurring units of ethylene and about 2 to about 15 wt % of a C3-C10 &agr;-olefin. It has a density from about 0.92 to about 0.944 g/cc, a melt index MI2 from about 0.01 to about 0.5 dg/min, and a melt flow ratio MFR from about 50 to about 300. It has a multimodal molecular weight distribution comprising a high molecular weight component and a low molecular weight component. The low molecular weight component has an MI2 from about 50 to about 600 dg/min and a density from about 0.94 to about 0.97 g/cc. A process for making the medium density polyethylene is also disclosed. The process uses a Ziegler catalyst and applies multiple reaction zones.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: November 26, 2002
    Assignee: Equistar Chemicals, LP
    Inventors: Philip J. Garrison, Lawrence R. Wallace, Danny L. Wise, James H. Meas, Jr., Leonard V. Cribbs, Jean A. Merrick-Mack, Paula L. Nygard
  • Patent number: 6486284
    Abstract: The subject invention provides a film having at least one layer comprising an interpolymer of ethylene and at least one comonomer selected from the group consisting of C3-C20 &agr;-olefins, dienes, and cycloalkenes, wherein the interpolymer is characteried as having a high degree of processability good optical performance, and good mechanical properties. The subject invention further provides film fabrication processes and polymer compositions which are useful in preparing the subject films.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: November 26, 2002
    Assignee: Dow Global Technologies Inc.
    Inventors: Seema V. Karande, Lonnie G. Hazlitt, Pradeep Jain, Kaelyn Koch, Shih-Yaw Lai, Li-Min Tau
  • Patent number: 6486277
    Abstract: A boron-containing zwitterionic neutral transition metal compound which can advantageously be used for the polymerization of olefins is described. Here, the use of aluminoxanes, such as methylaluminoxane (MAO), as a cocatalyst can be dispensed with and a high catalyst activity and a good polymer morphology can nevertheless be achieved.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: November 26, 2002
    Assignee: Targor GmbH
    Inventors: Gerhard Erker, Gerald Kehr, Jörg Schottek, Roland Kratzer
  • Patent number: 6486274
    Abstract: A Ziegler-Natta type catalyst having an improved hydrogen response provides for narrowing of the MWD of resulting polyolefins polymerized using such catalyst, with such catalyst generally made by a) contacting a soluble magnesium dialkoxide compound of the general formula Mg(OR″)2 with a halogenating agent capable of exchanging one halogen for one alkoxide to form a reaction product A, where R″ is a hydrocarbyl or substituted hydrocarbyl having from 1 to 20 carbon atoms; b) contacting reaction product A with a first halogenating/titanating agent to form reaction product B; and c) contacting reaction product B with a second halogenating/titanating agent to form a catalyst component; wherein in at least one of steps b) and c), the halogenating/titanating agent is a blend of Ti(OPr)4 and TiCl4. Catalyst components, catalysts, catalyst systems, polyolefin polymers, and methods of forming each are disclosed.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: November 26, 2002
    Assignee: Fina Technology, Inc.
    Inventors: Steven D. Gray, Tim J. Coffy
  • Patent number: 6486089
    Abstract: The invention relates to a process for uniformly dispersing a transition metal metallocene complex on a carrier comprising (1) providing silica which is porous and has a particle size of 1 to 250 microns, having pores which have an average diameter of 50 to 500 Angstroms and having a pore volume of 0.5 to 5.0 cc/g; (2) slurrying the silica in an aliphatic solvent having a boiling point less than 110° C.; (3) providing a volume of a solution comprising metallocene and alumoxane wherein the volume of solution is less than that required to form a slurry of the silica, wherein the concentration of alumoxane, expressed as Al weight percent, is 5 to 20; (4) contacting the silica slurry (2) with said volume of said solution (3) and allowing the solution to impregnate the pores of silica and, to disperse the metallocene in and on the carrier; (5) evaporating the solvents from the contacted and impregnated silica to recover dry free-flowing catalyst particles.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: November 26, 2002
    Assignee: ExxonMobil Oil Corporation
    Inventors: Yury V. Kissin, Robert I. Mink, Thomas E. Nowlin, Pradeep P. Shirodkar, Sandra D. Schregenberger, Grace O. Tsien